You can manage it but you will never get rid of it.....if your humidity is over 70% its a guarantee that the Powdery mold will spread fast and take over any grow.

I have had my strain for 15 years no problems.....I wont just give up a strain that nobody else has.

They do have an pesticide on the market that will control the Mildew its called Malatox.... keeps the mold in check for 6-7 weeks but I can find it anywhere.

Only other thing I can do is a sulfur burn or vaporizer... you can do that up to the last 2 weeks of flower